In modern heating systems to minimize the economic costs and increasing the efficiency of installations, more advanced equipment is used. Induction boiler for a private house - excellent alternative Classic models with Tamen.

The main advantage of induction boilers is a quick heating of the coolant, so the data of the model besides heating are used to heal water.

Principle of operation

The basis of the work is the principle of electromagnetic induction:

• After starting the device, the formation of electro magnetic field. In this case, the core is heated to a temperature of 75- degrees.
• Water through the inlet nozzles is supplied to the heat exchanger with the core.
• Heated to a given value, the coolant is fed into the pipe system through the outlet nozzles.

For heating big and multi-storey houses The presence of a circulation pump in the system is required.

Induction heating is the fastest of all existing at the moment.

Models consist of three main nodes (layers):

• Inner - directly core. It is made in the form of steel pipes.
• Insulation. It is necessary to reduce heat losses towards the aggregate.
• Outdoor - housing. Metal is made.

The coolant is used - water or antifreeze.

Dignity

• Efficiency. Compared with similar models, operating costs are 20% less. Efficiency induction installation more than 97%, which is higher than that classic models (due to the fact that the heat loss on the heating of the induction coil is minimal).
  The cost of electricity on heat production is significantly less than when burning coal or gas.
• Fast heating of the coolant.
• Durability. In compliance with the rules of operation and regular technical inspections, induction boilers can work up to 40 years.
  Due to the lack of mobile connections there is no wear of parts. The use of copper increases the service life of the winding. In modern models, the core is made of hardened materials that can work in aggressive environments of several decades.

It's important to know! The service life depends on the quality of transistors. Well-known trademarks offer a guarantee of trouble-free work up to 10 years.

• No scale. Due to the constant vibration of deposit, they cannot linger on the surfaces of the instruments, even with the oversaturation of the lime coolant. On the core constantly present bubbles of water, which repel the particles of scale.
• Compactness. The dimensions of induction boilers allow you to install them in a limited space. They do not require constant maintenance, separate room and the structure of the chimney.
• Silent. Induction models do not create acoustic oscillations (the noise is published by circulation pumps).
  Important! There are many circulating pumps whose work does not create additional noise.
• Safety. For correct operation and exclusion of emergency situations, UZOs and diphawtomates are used, a special disabling automation is installed on the housings of boilers.
• Fire safety. Unlike gas and solid fuel boilers, during the operation of induction there is no open fire.
• Easy installation. With minimal skills with electrical appliances and handling, install the boiler can be independently.

disadvantages

• High price. Induction models are 1.5-2 times more expensive than classic gas boilers or solid fuel.
• The presence of radio interference in close proximity to the boiler.
• Large mass. Boilers consist of metal parts. High-power models should not be mounted on the walls, because There is a high probability of the collapse.
• Installation of an induction boiler is acceptable only for closed heating systems with no more than 0.3 MPa.

Wine boilers

Designed for heating large frequent houses and cottages, garden and country houses, multi-storey buildings, industrial facilities.

The boiler with a vortex induction heater consists of the main nodes:

• Cylindrical heat exchanger.
• The primary coil is a large number of turns of the wire that is placed in a cylindrical case.
• Magnetic pipeline.
• Input and outlet.
• Terminal box required for connecting to the power grid.
• Control unit with thermostat.

It's important to know! The device is designed in such a way that there is no possibility of overheating of the internal elements of the system. The use of the compound allows metal surfaces Store temperatures up to 185 degrees.

Principle of operation

Cold coolant enters the unit through the lower nozzle. After heating, water is supplied to the heating system through the upper nozzle. Temperature control is carried out using a thermostat and thermostat.

Due to the design features, the unit always works at the maximum level. Therefore, to obtain an economic effect, it is necessary to use cyclic heating and connecting the coolant temperature sensors. After setting the required temperature mode, the automation shuts off the induction heating upon reaching the critical mark. After cooling the coolant, the automation also includes a boiler unit, creating a continuous heating cycle.

Important! The use of voltage control devices is irrational.

Single-phase wines boilers are made of small power, because With an increase in power, the current force increases to 50 A, which requires laying new household wiring cables of large sections.

To increase the power of the boiler unit from the wines, you must purchase and install additional water blocks or use a three-phase connection.

Important! When buying an induction boiler should also be provided for the purchase of an uninterrupted power source. For private houses, the best option is the transistor.

Induction boilers type SAV

Applied for autonomous and combined heating systems, hot water systems, backup heating source, maintain a given temperature in industrial installations (reactors).

The advantage of SAV boilers is the ability to remote temperature control and complete automation of the heating process.

Present an inductor, a system of short-circuited channels and pipes and a heating element - a core. Heating the coolant occurs due to education electromagnetic field and transformations of electrical energy into thermal.

Important! Due to the branchedness of the installation system has an efficiency approaching to 100%.

Cote machines are produced by three types:

• Low power. 2.5-10 kW. For small private and country homes.
• Average power. 15-60kW. For administrative and multi-storey residential buildings.
• High power. 100-500 kW. Used in industrial installations.

Conclusion

Induction boilers Have a number of advantages over models with Tanni. The high cost of equipment is completely paid off in several seasons, while the units do not require constant maintenance and structure of the chimney.

In the process of planning the device of the heating system in the country or in country house Many are trying to solve the problem of excessive energy spending by installing an induction boiler heating. In addition to saving electricity, its device is such that allows you to do without harmful emissions into the environment and does not represent any danger in the process of use. An important argument in his favor is the possibility of its independent design. In this article, we will look at what induction boiler heating: everything is about the principle of operation + 2 options of the device with your own hands. In addition, we will be apparent by its advantages over ordinary electric boilers and gas units.

Device induction boilers

The inductor (transformer) is based on the internal device of such a boiler. Ordinary household induction boilers differ slightly from similar industrial with a cylindrical winding system. In compact boilers domestic destination The copper winding of toroidal type is used.

The external body of the unit is made of painted metal, then a thick layer of heat and electrical insulation is underway, inside which is a dual wall core. It is made of extreme ferromagnetic steel and has a wall thickness of at least 10 mm. A toroidal winding that is wound on the core is the primary winding. It is in it that the electric field energy is transformed into a magnetic, which creates vortex currents. Already their energy is transferred to the secondary winding. The role of the secondary winding is the case of the contour, which, under the action of this energy, highlights a large amount of heat transmitted by the coolant. Toroidal winding allows you to create units with low weight and dimensions.

Principle of induction boilers

A boiler itself is usually included in the standard package, a completely necessary semiconductor converter, called an inverter, circuit breakers, an electronic thermostat. The temperature sensor itself is inside the boiler housing.

The work of induction boilers is based on the principle of electromagnetic induction. Its essence is that electricity consumed from the network creates an electromagnetic field. The coolant is supplied inside the boiler boiler through the aqueous pipe, which is welded below. A variable current with a frequency of 20 kHz arrives at the boiler through the inverter. When this instrument is turned on, the current flows through the toroidal winding of the boiler. In this case, the steel core is heated in just 7 minutes to a temperature of 750 degrees.

The heat generated is transmitted to the coolant circulating inside the contour. Fast heating of the fluid creates convection streams. This means that the preheated coolant is greatly expanding and rushes up the design of the boiler and then in the heating system itself. Often this happens enough to take place the full work of a household boiler having a middle length of the heating circuit. This method allows you to quickly heat the entire system, but for better circulation you need to additionally install a conventional circulation pump.

Thanks to the use of the principle of magnetic induction, heating the heat carrier in such boilers is much faster than in aggregates with Tanni, and heat loss is minimal. Almost does not occur on the core, no matter how tough and limestrine was not water.

This is because the vortex flows force the core to vibrate, not allowing the scale to form. At the same time, bubbles boiling from his body, purify the surface of the core. Due to the tightness of the entire system, the coolant takes the maximum (98%) the number of thermal energy released. Thus, these parameters greatly increase the CPD of the boiler, which is positively affected by its economy and operations.

Pros and disadvantages of induction boilers

Induction boilers have a number of unconditional advantages over ordinary boilers on theta:

• Stable efficiency indicators of up to 99% almost all time.
• The absence of heating elements, which significantly extends the use of the device.
• The absence of moving elements, which completely eliminates the mechanical wear and the need to replace components.
• The lack of detachable internal connections does not allow the occurrence of leaks.
• Complete availability of work even at a constant current or low voltage on the network.
• Very quick heating to the desired coolant temperature (5 - 7 min).
• A sufficiently high degree of electro- and fire safety corresponding to Class II due to the use of a core that is not directly related to the inductor.
• The lack of the need to install the chimney and providing a separate room under the boiler. To install this system there is no need to attract highly qualified specialists.
• Regulatory life of the device up to 25 years and even more. It directly depends on the tightness of the sealed outer seam and from the large thickness of metal pipes for the core. He does not need any preventive work during the entire period of operation.
• The boiler can use all available liquid coolants: oil, water, antifreeze, ethylene glycol without any preliminary preparation.
• You can change the process of working on a coolant once every 10 years.
• Good protection against overheating and various accidents, pecklessness during work.
• Electronic automated control systems are installed on the boilers.
• Inside the contour there is no scale.
• The ability to connect the boiler to any heating systems of the closed type.
• The minimum improverage of the coolant is 35 ° C.

But induction boilers have shortcomings, both in front of other heating devices and according to individual specific parameters.

• Such boilers can only be connected to the closed heating contour, very often with forced coolant circulation
• A fairly large weight of the boiler with quite small sizes. The weight of a 2.5 kW boiler is at least 23 kg at a complete height of 45 cm and diameter 12 cm.
• Large than other boilers price, which is due to the presence of an expensive part - inverter.
• The distance generated to a distance of several meters from the boiler of the radio intercourse in the long-wave, medium-wave and even VHF range. They do not affect the human body, but their pets and electronic equipment feel good.

Installing an induction boiler and control system to it

The installation of such boilers is possible only in the closed heating system. This requires an expansion tank-explicit and pump for forced circulation of the coolant.

According to the instructions, the induction boiler is set strictly vertically. After that, the feed pipe of the heating circuit is connected to the lower input nozzle. The output nozzle is located at the top of the device (side or from above). The feed pipe is flimbated on it.

The weight of the mounted boiler is quite serious, so the attachments need to pay the most particular attention. They must be very reliable, given that when the boiler runs, its weight will increase significantly due to the inside of the coolant. The side distance from the boiler to the surrounding items and walls is 300 mm. The distance to the floor and the ceiling - 800 mm and no less. An important and prerequisite for the installation of such boilers is their grounding. It is possible to use it, both metal and metal plastic pipes.

Next to the output nozzle, a security instrument group is embedded: a subversive valve, a pressure gauge, an air vent. The expansion tank is installed on a convenient section of the reverse tube of the system. Shut-off valves are mainly mounted after a security group.

Installation of the entire control system, as well as the boiler itself, must be made in accordance with existing rules and PUE standards, schemes and conditions contained in a technical passport existing.

Examples of homemade structures

If you are not going to use an induction boiler for the implementation of the main heating in a private house, and you want to equip them a cottage or a garage, then you can try to construct it yourself. There are two options how to do it.

First option

For its implementation, pieces of plastic pipes and a welding inverter will be needed. Having elementary knowledge in the field of physics and knowing how to use nippers, you can independently make an elementary induction model. To do this, you need to purchase an already created high-frequency welding inverter with a smooth adjustment of the current power up to 15 amps or even higher. For heating a large area, it is better to choose a much more powerful apparatus. Still need a rider from of stainless steel Or ordinary steel wire segments. This is necessary to perform the role of the heated element. Their length is about 50 mm, with a diameter of 7 mm.

An important component is the copper wire, which can be easily purchased at any thematic store. Do not use winding with old coils. The body that is the basis of the induction coil is both part of the pipeline, so it can be made from plastic pipe With thick walls. Its inner diameter should be 50 mm. Two weekends are fixed to this body for the intake of cold and recoil hot heat carrier. All the inner space of the case must be fully filled with wire segments and close the metal grid so that they do not fall out.

The induction coil is made as follows: around the previously cooked plastic tube are gradually winding copper wire covered with enamel. It will take about 90 turns. Received homemade device You need to connect to the pipeline network. From the pipeline cut out small plot Pipes, and instead, a homemade induction boiler is installed. It is connected through the inverter and simply start the water.

Second option

This option provides for the use of a three-phase transformer with the possibility and fixation. In addition, the welding machine will also need. For the manufacture of the device, you need to cook two pipes in such a way that they look like a bagel in the context. This design is performed as conductive and heating function. Then wound the winding, directly on the body of the boiler in order to more efficient workDespite low weight and sizes. It uses a standard heat heating scheme: it receives a large amount of thermal energy when contacting with winding.

The scheme of manufacturing such a design is somewhat more complicated than in the first version. The boiler is equipped with two nozzles, both for the input of the cold coolant, and for the output of heated. If you come up with and independently build a protective cover, you can minimize thermal losses.

Features of independent installation and operation of homemade boilers

As in the case of boilers produced at the factory, only the heating system of the closed type may be suitable for mounting the homemade induction unit. It should include a centrifugal pump that creates a constant circulation of the coolant inside the heating system. The plastic pipelines common today are better suited to install a homemade induction boiler. All regulations relating to the installation of shop boilers should be fully complied with the fully and in this case. If you install the control and safety instruments on the system, then yours homemade installation It will be little to give way to their factory fellows.

Although it is difficult to make such a device, and it is better not to take into this case without having "direct hands", to exploit its pleasure. After all, together with the convenience of operation, we also get serious energy savings.

After making the decision to heat your home with the help of electricity or establish an additional electric source of heat, homeowners are wondering, - what type of heater to use? Here the choice is small, the market offers electrical heat generators of three types: Tannoy, electrode and vortex (induction). The latter are represented the greatest interestSince it is declared by manufacturers as a new and most economical equipment. Induction boilers appeared relatively recently, therefore it is worth examining them in more detail.

Device of the vortex induction boiler

In fact, this technical solution Not new, the phenomenon of electromagnetic induction, at the expense of which electric induction boilers of heating, openly M. Faraday in distant 1831. Just with modern materials and technologies, the phenomenon is taken as a basis and implemented in water-heating plants relatively recently.

Water heating occurs due to the vortex currents (Foucault currents) appearing in the coil core. They are formed under the influence of an alternating electric field created by the coil with an alternating current of 50 Hz. The core is made in the shape of a pipe, through it and proceeds the heat carrier when heated. In fact, the device is an induction converter of electrical energy into thermal with an efficiency of about 98%. The diameter of the wire, from which the coil is made, the number of turns and the size of the core are calculated in such a way as to heat the water to the maximum temperature of 95 ºС and at the same time prevent overheating winding.

Water heaters like "wines"

The heart of the unit is a coil consisting of large number The turns of the insulated wire, and placed vertically in the cylindrical body as a vessel. Inside the coil was introduced with a metal rod. The body from above and below is hermetically closed with welded lids, the terminals for attaching to the electrical network are removed. Inside the vessel through the bottom nozzle comes with a cold coolant, which is filled with all the space inside the case. The water is heated to the required temperature goes into the heating system through the upper nozzle.

By virtue of its design, when connecting to the network, the heat generator is constantly operating at full power, as it is essential to supply the heating setting with additional voltage adjustment devices. It is much easier to use cyclic heating and cycling automatics of disconnection / power on with a water temperature sensor. You just need to exhibit necessary temperatures On the display of the remote electronic unit and it will heat the heat carrier to this temperature, turning off the water-heating induction element when it is achieved. After time and cooling the water, the automation will turn on the heating again for several degrees, this cycle will be repeated constantly.

Because the winding of the heat generator provides for a single-phase connection with a supply voltage of 220 V, heating units induction type Not made with high power. The reason is too much current in the chain (over 50 amps), it will require a large cross section cable laying, which in itself is very expensive. To increase the power, it is enough to conclude three waterfront installations in the cascade and apply three-phase connections with a supply voltage of 380 V. To each cascade device, connect a separate phase, the photo shows a similar example of the operation of induction heating.

Constructive features of Sibtekhnomash heaters
Using the same effect of electromagnetic induction, another enterprise develops and produces water heating devices a slightly different design that deserves attention. The fact is that the electric field created by the multi-ski coil has a spatial shape and propagates from it in all directions. If in the units "wines", the coolant passes inside the coil, the device of the induction boiler "Sibtekhnomash" provides a spiral heat exchanger, which is located outside the winding, as shown in the figure.

The winding creates an alternating electric field around itself, the vortex currents heat the heat exchanger pipe coils in which the water moves. Coils with coils are collected in the cascade of 3 pieces and attached to the common frame. The connection of each of them is carried out to a separate phase, the supply voltage - 380 V. The design "Sibtekhnomash" has several advantages:

• induction heaters have separate collapsible design;
• in the zone of the electrical field, there is an increased area of \u200b\u200bthe heating surface and more water due to the spiral scheme, which increases the heating rate;
• heat exchanger pipelines are available for flushing and maintenance.

Despite the differences in the design of the heat generator, the effectiveness of its operation is 98%, as in the heaters of the type "wines", this efficiency of the efficiency declares the manufacturer itself. The durability of aggregates in the other case is determined by the efficiency of coils, or rather, the service life of the winding and electrical insulation, this indicator plants - manufacturers are installed within 30 years.

Advantages and disadvantages

Real advantages that induction boilers have home heating or production buildingThey are as follows:

1. High, like all hot water plants, work efficiency, located within 97-98%.
2. Durability due to the lack of moving parts and simplicity of the design.
3. Small dimensions allowing you to put the heating equipment into the room of any size.
4. High heating rate of heat carrier and lack of inertia when it is turned off.
5. Comfort when operating, induction electrocoon does not require constant attention to the host of the house, and the frequency of its maintenance entire depends on the quality of the water used in the water system.

Vortex heaters are supplied with control automation kits, which makes it possible to associate heat generators with other climatic systems at home.

Heater in cut

There are equipment and disadvantages. The main one is high cost, especially in heat generators of the Sibtekhnomas type. If you use these aggregates for industrial purposes is quite acceptable, the induction heating of a private house may be unreasonably expensive.

The experience of practical use of vortex heaters by homeowners and service personnel of service companies is not too extensive, but at the moment there is no significant complaints about the equipment.

Myths about induction boilers

One of the most popular myths create sales representatives selling induction electric boilers. The bottom line is that these boilers are allegedly 20-30% more efficient than the other heating electrical installations, especially thene. This information does not correspond to reality, since all heat generators transforming electricity to heat, work with efficiency not less than 96% in accordance with the physical law of energy conservation. It is not unquest to the fact that the Teni warms the coolant somewhat longer due to its multi-layer structure. The tungsten spiral warms first quartz sand, then the material of the tube, and then water. At the same time, the energy is not lost anywhere, and the efficiency of the tank unit is 98%, as is vortex.

Example of heating system

Another myth states that the induction electric boiler does not require maintenance at all, since the alternating magnetic field does not give sediments to settle on the heating elements. This question depends on the quality of water and scale on the core of the coil appears in the same way as in the onan heaters, if the coolant is not desalted. Therefore, at least 1 time in 2 years, the heat generator itself and the heating system should undergo a flushing procedure.

Contrary to the assurances of sellers, the water heater cannot be put in any room. The reasons are two: the danger of damage to the current and the presence of an electromagnetic field around the device. It is better to put it in technical room With limited access (boiler room).

Conclusion

Heating installations that use vortex currents for heating really possess many advantages, especially among them attract the heating rate, compactness and durability. How much these advantages justify the high cost of the product - it will be possible to solve each homeowner individually.

Due to the constant increase in energy prices, owners country houses And urban apartments are in alternative, more favorable types of heating, mainly choosing its autonomous options. Some prefer to install not overpay for central heatingwhich in some regions is paid not only in winter, but also in the summer. Other housing owners are interested in heating at home with electrical appliances.

Electricity is more convenient in the sense that it does not require coordination with permits, compiling and approving the project to install such a water heater. But many scare up high rates. So, it is necessary to stop your choice on electric boilers, different increased efficiency and work efficiency. This is definitely the aggregates of the induction principle of operation can be attributed. They rightly created a fairly high competition of gas heating devices.

But the induction boiler itself is very checked "pleasure." Therefore, many homemade craftsmen are interested in the question - it is possible to make an induction boiler of heating with their own hands. It turns out yes, this is done by the task, but requiring certain skills and knowledge, especially in the field of electrical engineering.

Immediately make a reservation about the following. The author of this period is not a supporter of "homemade" in the region electrical technologyworking with stresses life-threatening. Therefore, this publication should be considered as an overview. possible optionsBut not as a step-by-step manual for action. It should be very soberly weighing your strength, knowledge and opportunities before you begin to fulfill such a task.

What is the induction boiler?

Induction heating systems began to be used in the 1980s last century at industrial enterprises. The household devices appeared only in the mid-nineties. Over the past decades, they were improved, and some updates were made to their design, however, the principle of their work remains unchanged.

The name of these heating systems and devices is in itself says that the basis of their functioning is electromagnetic induction. The essence of the principle of work is that if it is enough through the wire big diameter In the section, scored in the form of a coil, skip alternating current, then a powerful electromagnetic field is created around this primary winding. If the conductor will be in this field, then it will induce (induced) voltage. Well, if the power lines of the field crosses the core located in it from the alloy with magnetic properties, it turns out a kind of short-circuit contour. And due to the appearance of wandering currents of Foucault on it, very fast and strong heating of this material occurs.

This principle is widely used, for example, in the steel industry. We found it use for fast and high-temperature water heating. It is clear that the core in this case will be a pipe or another channel, which circulates the coolant.

And the most accessible example for the concept induction heatingthe body is a wire wrapped on a pipe made of dielectric, which will isolate the magnetic core, placed in its inner space.

The wire coil is connected to the power supply and creates an electromagnetic field. As a result of the effects of an alternating electromagnetic field, the metal rod core will be heated, transmitting heat to the heat carrier, which then enters the pipes and radiators of the heating circuit. As a coolant in autonomous heating systems, oil, water or ethylene glycol can be used.

This, of course, is a very simplified explanation. In induction boilers of industrial production to the heat exchanged ferromagnetic core, there may be a whole labyrinth of pipes or channels, and often, for example, in vortex heaters, the instrument housing is also involved in this process.

In the heating systems of a small length, the coolant, heating, will to go up, and the created natural pressure is usually enough for it natural circulation. If the heating line pretty long And the branched, tied to collectors with a further distribution of the flow of the coolant in separate circuits, then one or more circulation is set to the system, since without them the desired movement of the coolant will not be achieved.

Is the induction method of heating the heat carrier are effective and reliable?

Before buying or proceeding with the manufacture of an induction boiler, it is worth understanding how effective this method of heating is. In specialized shopping centers from sales assistants, you can only hear the positive characteristics of systems working on this principle. However, not everything that will be said, all 100% corresponds to reality. And these heating aggregates have their own so called, "underwater rocks".

Sellers operate with a whole list of theses, trying to increase sales of boilers working on the induction principle:

• For example, the approval is common that the principle of operation of these instruments is an innovative development.

In reality, this is not true, since electromagnetic induction was opened back in 1831 english Physico-Experimentator Michael Faraday. In the second half of the twentieth century, induction systems were successfully used in the metallurgical industry.

From this we can conclude that these devices are unlikely to be attributed to innovative technologies. However, there is also its own "plus", since this system has already been tested by time and proved its effectiveness.

• The following important quality on which sellers is doing is the cost-effectiveness of the induction boiler. It is usually argued that this type of aggregates consume energy by 25 ÷ 30% less than other electrical heaters. Is it possible to agree with this?

Prices for induction boilers heating

induction boiler heating

Probably still not. Anyway consumes electricity, respectively, its power specified by the manufacturer in a technical passport. That is, to generate a single kilowatt heat, in the very ideal case (with 100 percent efficiency), the device needs to consume kilowatt electricity. MoreoverEven with the parameters named, the Aggregate efficiency may be less, since much depends on the specific operating conditions of the boiler.

From the power and efficiency of the heating element, the heating time of the coolant to the desired temperature depends. It must be said that a part of the energy spent, one way or another, is spent in good, since the materials from which the details of the device are manufactured are not zero resistance. However, the heat loss from the work of the induction boiler does not go "into the chimney pipe", and remain indoors where the device is installed, which is often the obvious advantage.

So, it suggests that it is unlikely to seriously save on electricity when using an induction boiler. But the effectiveness of them and the heating rate is really high.

• Despite the approximate service life specified in the technical service (not to be confused with the warranty!), Sellers assure that the induction heating boiler will serve at least 25 years. It is necessary to agree that this information is reliable if the electronic control unit is performed efficiently. The block includes semiconductor elements, which can still fail. As a rule, manufacturers give a ten-year warranty on component elements of the electronic unit. However, quite often they work perfectly for 25 ÷ 30, and even more years.

On and in the bolet itself, by and large, just nothing to break. Thus, the primary winding, usually manufactured from copper, has a large margin of safety and serves a long time if its proper cooling (and this is ensured by circulating the coolant).

The core rod or the material of the internal channels of course will eventually begin to collapse, since the aggressive medium of the coolant will constantly have an adverse effect on it, as well as the alternation of cooling-heating. However, in order for it completely become unsuitable for operation, must pass more than a dozen years.

Considering the design of the boiler working on induction scheme, it can be concluded that it is much more reliable and durable heating devices, in which as Heating elements are used by Ten.

Prices for heating boilers

boiler

• Another quality that is placed in a plus induction heating device is a silent job - allegedly it distinguishes it from other heating units. The question arises, is it so?

But here, just, with the accuracy "on the contrary." Yes, electrical heating units function silently, since during their operation, acoustic oscillations are not created and mechanical nodes are not used. However, it is in the functioning of an induction device that low-frequency oscillations can be clearly fastened, which can irritate people with aggravated hearing. This negative phenomenon is minimized in vortex-type boilers, in which the supply voltage to the primary coil is pre-converted to high-frequency.

In addition, if the system has a circulation pump of low quality, it can also be a source of light irritating noise. But it already applies to all heating systems, regardless of the type of boiler. But the modern range of pumps fully allows you to purchase a completely silent model.

• Copper compactness Buyer can evaluate visually. It can be said that this unit consists of a segment of a certain length pipe that does not take up a lot of space, unlike other heating devices. True, the mass of the induction boiler is usually very impressive, that is, reliable brackets will be required.

However, you should not forget that the place is required for the associated elements of the system, as well as layout of contours and the installation of collectors, if the scheme requires. If it is necessary to heat a fairly large area of \u200b\u200bthe house, several induction devices are often installed, and a lot of space will be required for the entire system.

• The statement that the boilers of this species are completely safe, moreover, this quality of boilers is more pronounced than their inner analogues, incorrectly. The safety of operation in these two types of heating devices is about the same, and depends on the proper connection and on the performance of the systems laid in them from extreme situations.

For example, if a coolant leakage occurs in the induction device, and the electromagnetic field will not turn off on time, and the heating of the internal core will continue, the body and fastenings can be mounted literally in minutes. Therefore, purchasing the device or designing it yourself, you need to pay attention to the automatic shutdown of the unit in case of an emergency.

As can be seen from the above information, in induction boilers, as well as other heating units, have their own shortcomings, and they are not unique devices that allow you to pay for heating of a decent penny. However, their effectiveness is not questioned. And more thanks to the compact size of the boiler, it can be placed in an apartment, for example, in niche, so that it will be virtually impaired.

How to independently make an induction boiler?

There are quite a few designs of induction boilers. Some of them are complex for independent execution, others are simpler. Next will be considered relatively available options that can be made at home. However, to embody these projects into life, specific materials and tools will be required.

First option - with using induction hob Panels

This option heating device It can be called experimental. It is suitable for heating a small room at 20 ÷ 25 m². In the heating circuit heated from such a device, it is best to install or radiators that quickly warm and give heat into the room. In addition, the volume of such radiators is small, so a small amount of coolant will be required, which will quickly warm in the induction mini-boiler.

The source of the variable electromagnetic field in this project is an induction cooking panel, which may have been replaced by more modern modelAnd so far it is lying in the storeroom.

For the manufacture of this model of the heating device operating on the induction principle, the following materials will be required:

• Steel profile pipe 50 × 25 mm, ten segments of 500 mm long and two in 300 mm - for the manufacture of a heat exchanger of the boiler.
• Steel profile tube 50 × 30 mm, two pieces of 500 mm long and one in 700 mm - for the manufacture of the bracket.
• Steel pipe with a diameter of 20 ÷ 25 mm - two segments of 120 ÷ 150 mm long.
• Steel sheet with a thickness of 3 ÷ 4 mm for the manufacture of an expansion tank with a size of 270 × 270 × 100 mm.
• . Their quantity will depend on the specific scheme, which is done for a specific placement of the boiler and its strapping. To connect pipes, the associated elements are required - couplings, corners, threaded fittings, and the like. - Here you can show your own vision of strapping and pipe wiring.
• Ball valves that will overlap the movement of the coolant if preventive or repair work on heating equipment.

In addition to these materials, it is necessary to prepare some other devices and accessories necessary to complete the installation and for installation in the strapping of the boiler.

Prices for polypropylene tubes

polypropylene pipes

• Circulation pump.
• Induction electric two-component The stove is differently called the panel in a different way.

To perform work, you will need some tools and appliances, as well as, of course, work with them:

• Device for soldering polypropylene pipes.
• Gas key.
• Electric drill.
• Bulgarian (grinding).

Circulation Pump Prices

circulation pump

Work on the manufacture of such a heating induction boiler is carried out in the following order:

Illustration
	The first step, with the help of "Bulgarian" cuts profile steel pipe On the segments of the desired length. Of these, the housing of the heat exchanger will be manufactured, according to which the coolant will circulate. Segments fold close to the end side, it turns out a kind of battery. They must be fixed in pressed to each other. Next, the pipes are welded with a point welding. First, they are grabbed along the edges, and then throughout the line of the joints, every 100 mm. For the faster cooling and strengthening of welded points, as well as for cleaning from welded Gary, it is possible to shed a jet of cold water to clean the design.
	The next step is to fir the edges of the resulting "battery" - for this they are cut by grinding. Smooth edges are necessary, as they will be closed with a metal P-shaped profile (channel), which should be perfectly installed on the edges of the square pipes cooked together.
	The P-shaped profile can be purchased at a finished form or make it yourself, cutting out one wide band from the profile pipe. Such details need to prepare two pieces. Moreover, the carved bands will continue to be used to close the end edges of the P-shaped parts, as well as for the design of the brackets.
	Now, the resulting scope profile must be very gentle by a solid seam to the edges of the "batteries". The space that will be formed by this part will make it possible to circulate the coolant through pipes - two kind of collector are obtained. It should be noted here that it is quite possible to make a heat exchanger-battery in the form of a serpentine - it will simplify the circulation of the coolant, it will warm up faster, which will increase the heat transfer.
	Further, from one of the bands that remained after the manufacture of P-shaped profiles are cut down four plug inserts, in size, corresponding to the holes formed by the P-shaped profiles, welded to the ends of the battery. Then, they are welded to the place intended for them with a solid seam, as the design should turn out to be hermetic.
	Now, on the end sides of the battery you need to drill two holes in which the segments of pipes having a thread from the outside are breeding. One nozzle should be located at the bottom of one side of the battery - it is intended to enter the cooled water into the heating boiler (the so-called "return"). The second nozzle is welded into the hole located at the top of the opposite side of the structure. Through it, the heated water will enter the heating circuit (feed). In addition to them, in the center of the side, also with welding, segments of the profile pipe with a length of 100 mm are fixed.
	Welding points and seams on the finished heat exchanger are cleaned with grinders and give the designs neat appearance and smoothness. Especially carefully you need to process the rear side of the heat exchanger, since it should be pressed the heating surface of the induction plate.
	Next, the finished assembly needs to be primed and then covered with heat-resistant paint intended for metal elements of the heating system.
	The next step from metal panels is made expansion tank. Its parts are welded with each other with a solid seam, as it should be sealed. In the lower side of this detail of the system, the nozzle with an external thread is crashed to connect to the heating contour. It must be said that the expansion tank can be bought and in the finished form. Its capacity is chosen depending on how much coolant will be in the heating circuit - it is possible to proceed from the value of 10% of the volume.
	Next you need to prepare frame-bracket for installation induction panel and fixing the heat exchanger. In this illustration, you can see that the bracket consists of two vertically arranged profile pipes and a lower shelf. The latter can also be made of a profile pipe with which one narrow and one wide side is cut. In the middle of the vertical profiles, the segments of the profile pipe are welded. Their location must be calculated so that they can docile with the cuts of the pipe fixed on the ends of the heat exchanger. Then all the parts are sealed with the welding, and the lower horizontal part of the design should form a shelf to which the induction panel will be installed. After that, the heat exchanger is fixed on the bracket with the segments of the pipes welded on its ends. However, there should be a gap between the bracket and the heat exchanger, in which the induction panel can be installed, so that it is tightly pressed against the heat exchanger with its heating elements.
	The induction panel for cooking works on the same principle as the boiler, since the coils induces the powerful variable electromagnetic field inside it. This field and will become the "initiator" of heating with steel profile pipes of the heat exchanger battery. The convenience of using it is that all electronic and electrical modules are inside the design, and the external panel coating makes the device safe. By installing the panel into the bracket behind the heat exchanger, it is pressed to its surface.
	Now it remains only to bring pipes to the boiler that will connect it with the heating circuit. To do this, polypropylene or metal-plastic pipes can be used, the main thing is that they are intended for hot waterhaving a temperature of at least 95 degrees. As mentioned above, the outlet of the heated coolant from the installation is associated with the pipe delivering it to radiators, as well as with an expansion tank, which is fixed on the wall under the ceiling.
	The entire system will not effectively work without a circulating water pump, which can be installed in any convenient place of the heating circuit, but ideally - on the pipe "Frames" before the input of the boiler - there is a lesser extent being exposed to high-temperature effects. It is desirable that it is located not far from the power outlet.
	It remains to fill the system with water (coolant), check the tightness of all connecting nodes. If everything is normal, you can run the boiler. The illustration shows a trial start, using carrying. In real operating conditions, certainly it is necessary to bring a separate supply line with the corresponding cross section of the wire and the ground circuit.

Using the induction panel, you can make another option of the boiler, which will be more efficient than the above described above, albeit less compact.

The peculiarity of this option is horizontal arrangement induction panel with installed directly to heating pads located in it, heat exchange blocks. Here the design, in fact, works in the same way as the usual tile on which is installed with water with water and heated to high temperatures. The difference lies in the fact that the capacity ("pan") is made from ferromagnetic Alloy, all its walls are actively heated. These containers are made with hermetic, associated with each other, and the heated water does not evaporate, but goes into the heating circuit connected to such a boiler.

The second option - with a homemade induction coil and welding inverter

The second version of the inductor heater of the boiler is made on the basis of high-frequency welding inverter. It is desirable that the device is equipped with a smooth adjustment of the welding current. The power of the inverter must be directly proportional to the power that the heating boiler must have. Most. suitable option for homemade design It is an index of the inverter in 15 amps, however, if necessary, you can make it more powerful.

It should be properly understood that the connection of the water heater is made by no means to the terminals of the welding wires - nothing but the short circuit in this case will not work. The inverter will have to be somewhat modified - the primary winding of the generated heater should be connected after a high-frequency converter, instead of the induction coil of the inverter itself. If it is difficult to deal with this very much, then consult with a specialist in this area.

This principle of heating and is used for heating the coolant that It passes through the same pipe placed in the electromagnetic field. The option shown below can be called a very controversial, but the master who tried it in practice, convinces it in its performance and efficiency.

As will be seen, manufacturing costs are minimal, so if you wish, it is possible to carry out an experiment. Let even power not enough for full heating - it is possible that it will be an acceptable solution for heating water for domestic purposes.

Illustration	Brief description of the operation
	So, in addition to the welding inverter unit, a number of parts will be required to create a heater. As a hull, which will be part of the heating circuit, as well as the basis for the formation of an induction coil and heat exchanger, a segment of a polypropylene tube with thick walls (PN25) is 400 ÷ 500 mm long, designed to transport hot water. It is desirable that the inner diameter of the pipe is at least 50 mm, that is, a pipe with an external diameter of 75 mm is used. You can take and smaller, say, with an external 50 mm, internal - 33, but the performance of the heater is understandable, will decrease. A steel wire or a metal rod with a diameter of 6 ÷ 7 mm is reduced - a length of 40 ÷ 50 mm is cut from it. These elements will take on the role of the ferrimagnetic heat exchanger core. Other sources of heat exchangers are possible - it will be referred to below.
	Instead of sliced \u200b\u200bsegments of the rod inserted into the cavity of the pipe, one thick metal rod or a steel pipe of a smaller diameter, steel auger, or other products with magnetic properties and convenient indoor PVC can be used. So, practice filling the pipe with steel balls, a large chips, unnecessary nuts, etc. If small metal elements are used to fill the pipe, from which the coolant will be heated, then one edge of the pipe must be closed with a metal grid. Then fill the steel elements of the filler into it, and then close the second edge with the mesh.
	You can use a metal auger with frequent coils or several metal tubes with a diameter of 4 ÷ 5 mm, which will be tightly installed in the polypropylene body tube. They will provide a large area of \u200b\u200bdirect heat exchange with circulating water. Some wizards are used to fill the "boiler" steel wire or even ordinary kitchen rods from a stainless steel, tightly scoring with a polypropylene tube.
	By purchasing kitchen rods for such purposes, there will be necessary to check on whether they have magnetic qualities. To do this, departing for buying in the store, you can take a regular magnet with you and attach it to the product for cleaning the dishes. If such a urine is magazine, it means that it is suitable for filling the cavity of the induction heat exchanger. As the chips are thin, it will be very quickly warm, giving thermal energy The heat carrier who will pass through it. Dense Pipe Filling metal chips You can, perhaps, be called the most simple, affordable and efficient option.
	When the housing of the induction heat exchanger will be filled metal productsIn its edges, adapter couplings are welded, leading its large diameter to the diameter of the heating circuit pipes. Then, if it is necessary to install the device in a particular place, the corners of the coolant in the desired direction are welded through the cutting of the pipe. It will be nice to breed the coupling with American nuts - So the heating device will be removable, for example, to perform any repair and recovery or preventive work. The specific scheme of the splitting of these corners-taps or, if necessary, direct pipes of the pipe is prepared in advance, based on the specific conditions for installing the heating device and wiring the contour.
	Next, you need to stick the textolite sticks or rods that will serve as the basis for winding an induction coil. Textolite is selected because it has excellent dielectric qualities and is not afraid of elevated temperatures.
	At the edges of the heat exchanger case, from the same textolite, you need to make counter-compensators for the wire ends, 12 ÷ 15 mm high. They will be required to locate terminal contacts through which the boiler will connect to the inverter unit.
	The coil is wound from an isolated wire with a cross section of 1.5 mm, which is used for winding in transformers. The coils are stacked on top of the textolite rods in a step of 3 mm. The ends of the cable are fixed on textolite retainers. Winding should consist of a whole segment of a well-insulated cable, since it is precisely the electric current that creates the electromagnetic field necessary to warm up the heat exchanger core will be held.
	To create a winding, you will need 10 ÷ 10.5 m insulated cable from which 90 turns should turn out. Its length and the size of the section was determined after the correspondence of the coil parameters located on the "native" inductor of the welding machine. To connect the coil to welding machine The terminals are fixed on the ends of the winched wire. The connection is necessary to isolate well.

All this design, in order to safety, can be placed in the casing, which will serve as an external insulation for the device. It must be made of dielectric material that can serve as a pipe of large diameter from PPR, PVC or PE. In the protective cover, the holes are provided for the release of the ends of the power cable, the output of the cutting nozzles in the heating circuit or hot water supply. For example, ends can be sealed with plugs, putting on heat-resistant glue and making in them or side parts of the housing of the holes for nozzles. Here, in principle, a wide field for the fancy of the wizard.

The test of this device can be carried out only after installing it into the heating system and filling it with the coolant. Otherwise, when heated, the polypropylene tube of the hull can quickly melt.

This illustration shows an exemplary scheme of an autonomous heating circuit with an inductor boiler installed in it. The system consists of the following elements and nodes:

1 - Connecting to an electrical network through an energy converter. In the above construct, a high-frequency welding inverter converter is used as it.

2 - Induction water heater itself.

3 - elements of the "Security Group", which can relate to a pressure gauge, a thermometer, safety valve And automatic air road.

4 - ball valves overlapping water supply on a specific section of the contour, as well as for feeding or draining water from the heating circuit.

5 is a circulation pump required to create the necessary flow of coolant.

6 - mechanical (mesh) for cleaning the coolant. The filtering of the coolant allows you to significantly increase the service life of the boiler equipment.

7 is a membrane expansion tank required to compensate for the temperature expansion of water or a different coolant.

8 - heating radiator. In the system running from the induction boiler, bimetallic or aluminum radiator. They are distinguished by small volumes and very high heat transfer.

9 - line for fueling the water system or emptying for prophylactic or repair work.

In the conclusion of the publication, it is necessary to emphasize once again: if there is no experience with electrical products, the knowledge of the beginning of physics was forgotten, there is no confidence in their skills in plumbing and plumbing work, then it's not worth it for such a thing. It will be best to purchase an induction boiler in the finished form or in case of emergency, Order the device at the experienced master who not only makes it, but will check its performance and safety.

Video: Master is divided by secrets of independent manufacture of induction boiler

Abundance of advertising and complex technical component of heating equipment often do not help, but only make it difficult to choose. What is more profitable, more comfortable, what manufacturer is the best service, how complex and expensive installation? All these and most additional questions have to find answers to everyone who is going to repair the old or create a new heating system. In this article, we will tell about what the induction boiler of heating and consider, what techniques are used to make marketers to achieve their main goal - sales.

The article will be interesting to homeowners who decided to upgrade their heating system and establish a reserve boiler, especially those who have one source of heat - electricity and the choice is only behind the type of electric heating. After reading, you can professionally communicate with sellers of equipment and installers, and do not allow yourself to deceive self-confident entrepreneurs in the market.

What is electric heating

Let's deal with. Electric heating is artificial process Increase temperatures due to the end of the energy. There are several ways to transition electrical energy to thermal: without contact with the heated object (induction-coolant) and at contact with the heated object (TEN-coolant). It is in comparison with the Tannote boiler that enterprising marketers managed to "intelligibly convey" to a potential buyer information about "incredible" induction boiler. By the way, such a boiler used for household needs, you will not be able to find in any European country.

The use of an induction method of heating is limited exclusively by the processes of metal heating and other conductive materials.

The principle of operation of the induction boiler

Induction heating is carried out by means of an alternating magnetic field, which the heated object absorbs and converts to thermal. Therefore, it is heating products from conductive materials. To convert electrical energy to thermal, it is necessary to have three components:

• alternating current (standard electrical network 220V, 50Hz);
• inductor, i.e. Multi-ski cylindrical coil (more often copper);
• the core from any ferromagnet (material to which the magnet lipnets is more often metal).

Induction boiler device diagram

Now we will now consider the principle of the induction heating:

1. A variable electric current passing through the inductor, creates a magnetic field around the coil;
2. The magnetic field creates the vortex currents of Foucault on the surface of the core, which warp the workpiece under the action of Joulehea heat (the law of Joule-Lenza);
3. The heat from the heated core is transmitted to the heat carrier by the heat carrier due to the thermal conductivity of the material.

If it is simple, then this is a lowering transformer that was installed in the pipe.

In this way, electric Energy It is transmitted only by the core, without the use of contacts, and the heated core (steel pipe) is still in contact with the coolant. And yes, on the surface of the core, the particles can also settle and worsen heat exchange. Marketers are more often talking about cavitation (fluctuations) of the core and, therefore, the embarrassment of "scale". In practice, make sure this will be difficult, and is it an essential advantage? The steel core has a sufficient surface area for an efficient heat supply even if there are deposits.

The principle of operation of the water-heating induction heat generator is demonstrated on the video. Many fraudsters and nonsense taught such devices with gullible buyers under the guise of heaters.

How not to become a victim of deception when buying an electrocotel for heating

Safety of heat generator

When choosing a boiler, its safety plays a paramount role. In cheap daub heat generators, one of the main problems is the current leakage. This is due to poor-quality Tan. When using certified components, current leaks are minimized.

In the induction boilers, the lesion of the current is possible in the power supply of the heat generator and the leakage of the system, because any method of direct contact of the coolant (conductor) with a current or magnetic field is unsafe. Describing complex processes does not make sense. The risk of damage to the current when using cheap electric boilers is very high. This is the main reason why it is skeptical to refer to induction cats.

In order to reduce the specified risks when choosing a boiler, pay attention to the quality of the electrical switch (automaton), thermostat, temperature and flow sensor. If these elements of Chinese production and even their appearance does not inspire confidence, count on high quality assembly of such a heat generator

Meet the market thermal equipment Domestic induction electric boilers of heating, which would be equipped with ABB, Moeller or Schneider circuit breakers, are almost unrealistic. It is worth thinking about it. If you have a high-quality wiring in your house, then you have different requirements for the quality of electrical equipment with the manufacturer.

If you install any electrical appliance With a capacity of more than 1.5 kW, do not regret the funds for the purchase of a circular circuit breaker of the UDO and be sure to ground, which is indicated in the instructions of any electric boiler.

It will not be superfluous and buy voltage stabilizer. The inclusion of high-power electrical equipment affects the parameters of the network in the house, which can lead to failures in the work of modern household appliances and other devices. When using "miracle boilers", the circuit breaker works constantly, it speaks of wandering currents and, of course, about the risk of lesion to the current. Think, do you need a source of doubtful quality in your home, which uses a powerful magnetic field?

When choosing heating equipment, preference should be given to products of well-known companies with international standards, service center in your region and the presence of a legal framework for responding to customer claims. In my practice there was not a single case in which the manufacturer of "wonderful" boilers, "made in the CIS," would be real responsibility for the defective goods. The reseller chain, the lack of a real warranty and service centers on the basis of private enterprises make warranty service almost impossible.

The claimed and real efficiency

All electrical energy is transmitted with almost 100% of the efficiency in any electric boiler and heat loss can only be due to poor heating of the boiler housing. Manufacturers of induction boilers are often manipulated by the indicators of the efficiency of the efficiency in the tannic boilers, explaining this by the appearance of scale on the surface of the Tan, but this is absolute nonsense. First, calcium deposits are a heat conductor. Secondly, if we consider deposits as an insulator, the efficiency will be unchanged, only the heating time of the coolant to the specified parameters will change.

The most important thing is that you need to understand once and forever: no miracles! There are no innovative developments of scientific institutions of the Cold War and Technologies of submarines with spacecraft whose efficiency exceeds 100%

Note! Any electric heating has an efficiency approximate to 100%. There is no, for example, electrical household water heaters using the "induction" method of heating. This is primarily due to the protection of the consumer from lesion to the current. And if you once again, the sellers of abnormal phrases will talk about savings up to 30% and about high efficiency, then ask where the unused energy is going if the boiler efficiency is less than 100%. IN gas bolery Heat goes through the smoke tube, but what happens to the electric boiler? Easy trolling will give the seller to understand what you are in the subject, and he will stop seeing the voy of physics in the 9th grade in you.

Noise, compactness and weight

All electric boilers work silently, the noise may appear in the following cases:

• cavitation (oscillation) of the pump,
• overheating boiler
• setention section of the pipeline.

All electrical boilers are about the same volume. The induction electric boiler for heating weighs more thanken, so it is necessary to provide for it the right fastener, not forgetting about the cavitation of the heat generator.

Temperature adjustment

If you really want to save electricity, then pay attention to the way of adjusting the temperature in the room. Experts recommend adjusting the water supply temperature to radiators, namely the temperature in the room. To do this, you can use remote room thermostat or thermostators on radiators. Pay attention to the weekly programmable thermostat - chronothermostat, with which you can set different temperature mode During the day or at another specified period of time. The economy of the heating system characterizes the whale (fuel utilization rate), and not the efficiency of the boiler. That is, the room should be fully heated only when it is really necessary. For example, when there is no one at home, the temperature can be reduced to + 16c.

Disadvantages of induction electric boilers

Do you need a powerful source of magnetic field in the house

Advantages of induction boilers in comparison with Tanov

1. Increased demands on the coolant in the Tanne boiler. Indeed, water for the heating system, which uses a penny element to extend the service life of the Tannius, it is necessary to prepare, reduce the content of calcium and magnesium, perfectly pass through reverse osmosis. In practice, a fairly good polypropylene filter by 5 md.
2. Power control (voltage jump) is less noticeable in the induction boiler, but only with rosight adjustment. This advantage is significantly only in comparison with cheap daubery boilers of domestic or Chinese production, which work on the principle of fully "ON" or "OFF". In developed countries, such an adjustment attitude is unacceptable, therefore, in modern boilers, the Tan is divided into groups and are included alternately.
3. The induction boiler consists of a smaller number of parts and has more simple design, Therefore, it is cheaper and serves longer. Minimum components and the most simple device allows you to make an induction heating boiler with your own hands.

Homemade induction boiler heating: scheme

Output

The induction boilers of heating consume the same amount of heat as the Tannaya. Miracles do not happen. The induction method of heating has several advantages and is widely used in industry.

The use of induction heating in domestic conditions requires high quality components and collecting heat generator. To do this, it is necessary to increase the level of production capacity of domestic enterprises engaged in the release of induction boilers, introduce international Standards and quality control techniques

When buying a heating boiler, pay attention to the manufacturer of the ISO 9001 standard - the standard of quality management system and other international Certificates and international awards

Be sure to ask the conditions for warranty service of the heat generator. And do not hesitate to ask a question of legal liability in the event of a shock. Believe the alignment of sellers in the fact that there was no more similar in 30 years, it is not worth it. You need specific answers to questions who are responsible and in which documents it is spelled out. Do not forget that all permits for the use of an electric heater in fire hazardous rooms must be confirmed by the relevant certificates.

Video: Induction boiler